Standard special order priority code. It just means that you're a custom build.
If it were a 01-09, that's a rushed order. Dealers typically keep 10-18 open for special circumstances, or if they need to bump something up.
19 - 99 is coded for dealer specific builds. 19 is "Custom Retail Order". No need to worry unless you see a code that has 50* and a notation. That typically means your order is being held back.
10-19 are customer orders. 10 best, 19 worst. 20+ are dealer stock orders.
Don't think on it too much, it probably wont make much of a difference if any because things will get built when parts are available, a priority code 19 black diamond could easily be built before a 10 wildtrack,
I still wondering IF Ford is going to honor that since well they are creating the shuffled deck after 3/19. I keep thinking in this scenario with the Bronco its worthless to the dealer but I dunno. It IS important on normal order/special order stuff.
When converted, they drop in at 99 (not build-able) with random colors and base options. When the dealer makes changes to the order (your colors, options, etc) it saves it as a 19 (10-19 is build-able). Then it can be changed to 10 or leave it at 19, each dealer will be different.